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Justiciosides E-G, triterpenoidal glycosides with an unusual skeleton from Justicia betonica |
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| Authors: | Tripetch Kanchanapoom Pawadee Noiarsa Hideaki Otsuka |
| Institution: | a Department of Pharmaceutical Botany and Pharmacognosy, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand b Department of Pharmacognosy, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima 734-8551, Japan c Chulabhorn Research Institute, Vipavadee Rangsit Highway, Bangkok 10210, Thailand |
| Abstract: | Three new triterpenoidal glucosides, justiciosides E, F and G, were isolated from the aerial portion of Justicia betonica. Their structures were established through chemical and spectroscopic analyses, and showed an unusual A-nor-B-homo oleanan-12-ene skeleton type for the aglycone moiety as A-nor-B-homo-oleanan-10,12-diene-3β,11α,28-triol 28-O-β-d-glucopyranosyl-(1→2)-β-d-glucopyranoside, A-nor-B-homo-oleanan-10,12-diene-3β,11α,28-triol 28-O-β-d-glucopyranosyl-(1→2)-β-d-glucopyranosyl-(1→2)-β-d-glucopyranoside, and 11α-methoxy-A-nor-B-homo-oleanan-10,12-diene-3β,11α,28-triol 28-O-β-d-glucopyranosyl-(1→2)-β-d-glucopyranosyl-(1→2)-β-d-glucopyranoside, respectively. |
| Keywords: | Justicia betonica Acanthaceae Triterpenoidal glycoside A-nor-B-homo olean-12-ene |
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